DILUTION METHOD OF DISCHARGE MEASUREMENT IN PIPES.

The dilution method, or the method of mixtures, is a tracer technique for discharge measurement in steady flow. The method is based on the mass balance of a tracer injected at a steady rate into the pipe flow and depends on measuring the concentration at one or more points downstream of the injector in order to evaluate the average concentration of the tracer. The accuracy of the method depends on the tracer, on the injection and measurement equipment, and on the locations, of the sampling ports since these locations determine the accuracy with which the concentration measurements represent the actual average concentration.